package com.itheima.reggie.controller;

import com.baomidou.mybatisplus.core.conditions.query.LambdaQueryWrapper;
import com.baomidou.mybatisplus.extension.plugins.pagination.Page;
import com.itheima.reggie.common.R;
import com.itheima.reggie.entity.Category;
import com.itheima.reggie.entity.Employee;
import com.itheima.reggie.service.EmployeeService;
import lombok.extern.slf4j.Slf4j;
import org.springframework.beans.factory.annotation.Autowired;
import org.springframework.util.DigestUtils;
import org.springframework.web.bind.annotation.*;

import javax.servlet.http.HttpServletRequest;
import javax.websocket.server.PathParam;
import java.time.LocalDateTime;

/*
    员工管理
 */

@Slf4j      //为类提供一个属性名为 log 的 log4j 的日志对象
@RestController
@RequestMapping("/employee")
public class EmployeeController {

    @Autowired
    private EmployeeService employeeService;


    //员工登录
    @PostMapping("/login")
    public R<Employee> login(HttpServletRequest request,@RequestBody Employee employee){
        String username = employee.getUsername();
        String password = employee.getPassword();

        //TODO 判断账号密码是否为空
        if (username == null || password == null){
            return R.error("账号或密码不能为空");
        }

        //1.将页面提交的密码password进行md5加密处理
        password = DigestUtils.md5DigestAsHex(password.getBytes());

        //2.根据页面提交的用户名username查询数据库
        LambdaQueryWrapper<Employee> queryWrapper = new LambdaQueryWrapper<>();
        //往queryWrapper内设置查询条件（Lambda表达式格式）
        queryWrapper.eq(Employee::getUsername,employee.getUsername());
        //使用对象进行查询
        Employee emp = employeeService.getOne(queryWrapper);

        //3.如果没有查询到则返回登录失败
        if (emp == null){
            return R.error("登录失败");
        }

        //4.密码比对，如果不一致则返回登录失败结果
        if (!emp.getPassword().equals(password)){
            return R.error("登录失败");
        }

        //5.查看员工状态，如为已禁用则返回该员工已禁用
        if (emp.getStatus() == 0){
            return R.error("该账号已禁用");
        }

        //6.登录成功，将员工id存入Session并返回登录成功结果
        request.getSession().setAttribute("employee",emp.getId());

        return R.success(emp);
    }

    //员工退出
    @PostMapping("/logout")
    public R<String> logout(HttpServletRequest request){
        //1.清理Session中保存的员工id
        request.getSession().removeAttribute("employee");
        return R.success("退出成功");
    }

    //添加员工
    @PostMapping
    public R<String> save(HttpServletRequest request,@RequestBody Employee employee){
        log.info("新增员工，员工信息：{}",employee.toString());
        //设置初始密码1235546，需要进行md5加密处理
        employee.setPassword(DigestUtils.md5DigestAsHex("123456".getBytes()));
        //获取员工姓名
        String name = employee.getName();

/*
        //设置创建时间与修改时间
        employee.setCreateTime(LocalDateTime.now());
        employee.setUpdateTime(LocalDateTime.now());

     //获取当前用户登录的id
        Long empId = (Long) request.getSession().getAttribute("employee");

        //设置当前创建和修改的用户id
        employee.setCreateUser(empId);
        employee.setUpdateUser(empId);
*/

        //如果不存在则添加新员工
        employeeService.save(employee);
        return R.success("新增员工成功");
    }

    /**
     * 分页查询数据要封装为Page类型方便将数据给到前端
     * @param page          展示的页面
     * @param pageSize      页面展示条数
     * @param name          条件查询的条件
     * @return
     */
    @GetMapping("/page")
    public R<Page> page(int page ,int pageSize,String name){
        log.info("page = {},pageSize = {},name = {}",page,pageSize,name);

        //构造分页构造器
        Page pageInfo = new Page(page,pageSize);

        //构造条件构造器
        LambdaQueryWrapper<Employee> queryWrapper = new LambdaQueryWrapper<>();
        //添加模糊查询
        // 过滤条件
        queryWrapper.like(name != null,Employee::getName,name);
        //添加排序条件
        queryWrapper.orderByDesc(Employee::getCreateTime);

        //执行查询(查询到的数据会自动装到page对象中)
        employeeService.page(pageInfo, queryWrapper);

        return R.success(pageInfo);
    }


    /**
     * 修改员工信息
     * @param request
     * @param employee
     * @return
     */
    @PutMapping
    public R<String> update(HttpServletRequest request,@RequestBody Employee employee){
        log.info(employee.toString());
/*
        //获取当前用户id
        Long empId = (Long) request.getSession().getAttribute("employee");
        //设置修改人id
        employee.setUpdateUser(empId);
        //设置当前修改时间
        employee.setUpdateTime(LocalDateTime.now());

*/

        //调用业务层方法按id进行修改
        employeeService.updateById(employee);

        return R.success("修改成功");

    }


    /**
     * 查询员工信息
     */
    @GetMapping("/{id}")
    public R<Employee> getById(@PathVariable Long id){
        log.info("根据id查询员工信息");
        //根据id查询员工信息
        Employee employeeServiceById = employeeService.getById(id);
        //判断是否查询到员工
        if (employeeServiceById != null){
            //返回员工信息
            return R.success(employeeServiceById);
        }
        return R.error("没有该员工id");
    }



}
